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Iam in dire need of help and am tired of taking my unit to places to
get it fixed only to find out they can't fix it either and I still get
charged. My jetski is only running on 2 cylinders.
Iam no slouch when it comes to mechanics and consider this the first
time to have ever taken something to someone. Frankly Iam terrified to
take it to anyone after the last bad experiences with well known
businesse near my home town and another shop out of town that couldnt
fix it or tell me what was wrong with it.
I have a 1995 Polaris SLX 780 and it is giving me quite a mysterious
problem that I cant figure out. My jetski will only run on cylinders #2
and #3 even though cyl. #1 has fuel and spark and good compression.
I have 150 lbs. compression on all 3 cylinders and find no signs of leakage around the cylinder base or head.
I have spark to all 3 plugs according to what I see and it is very blue
and strong on each cyl. I tested this by laying each plug next to the
engine and watching it fire as I turned over the engine. I put all of
the plugs back in and connected the wires on them and fired up the
unit. I then placed a timing light on each of the cyl's. to verify that
there was electrical current running to the plugs through the wires.
There was current to each cyl. according to the timing lights blinking
strobe.
During this test I removed the spark plug boot from #1 cyl. started
the unit...made no difference in running. I proceeded to do the same to
the other remaining 2 cyl's. and the engine dropped in power and rpm.
Before starting this test I put in 3 new plugs to make sure they
weren't the contributing the problem I am experiencing.
After 10 mins or so of running I pulled all the plugs out and # 1
looked as new and white as it was when I put it in even though it was
slightly wet with fuel. I repeated this test again after rotating the
known firing plugs to # 1cyl. with same results. nothing. The other
cyl's #2 and #3 were showing light tannish color indicating to me they
were burning fuel and firing.
I proceeded to check the carburetors to make sure they were receiving
fuel. Yes they do have fuel.
I then took #1 spark plug out and sprayed starting fluid directly into
the cylinder put the plug in and started the engine. #1 cylinder still
did nothing... as the engine was running this time. I had removed the
air cleaner and sprayed fluid directly into the carb.as it was running.
Still no response out of #1 cyl.
Ok. this is probably a bad move to do but what i did was pull the
wires off all cylinders. I put #3 wire on # 3 plug and fired the engine
on that cyl.by itself briefly. It ran. stopped the engine took that
wire off and put #2 wire on #2 cyl and the engine ran on that cyl by
itself. I did this same test to # 1 cyl. and not a thing and then
repeated the starting fluid in the plug hole and carb as I mentioned
above to see if anything happened. nothing. Yet I still have a strong
looking spark on the plug. I had then opened the electrical box and
swapped one of the other coils with another to the #1 plug to see if it
would fire the cylinder and got the same results. One other thing that
may not be of relevance is that my readout gauges dont work and the
fuse in the electrical box is blown. Not sure if this has anything to
do with my dilemma at hand.
This is where I become stumped. What is it that Iam overlooking?
I have spark on all three cylinders, fuel, 150 lbs. compression....
should run right? Why am I only getting a response out of cyl. #2 and
#3 and not #1 if all the correct stuff is there to make it fire?
Iam assuming that because I have fuel to the #1 cyl.(indicated by the
wet plug) that isnt doing anything...... the reed is ok ? yes? The
way I understand is the fuel enters the crank case via carb then
through the reed into the crank case up through ports into the
cylinder. If the reed is bad then fuel will not be drawn to the
cylinder. Is that a correct assumption?
I have taken the flywheel cover off and pulled the flywheel so that I
could inspect the stator assembly, magneto and the flywheel itself. I
saw nothing out of the ordinary from what I could see by eye anyhow.
The pick up sensor on the bottom looked good and everything else was
top shape. Nothing was loose or looked as if it was out of place. I
have no way of testing these parts but could and would do so if someone
can tell me how with an ohmn meter or whatever I may need to do it.
I have ridden this jetski for almost an hour and not one time did that
cylinder fire off or cut in.
I am having a hard time getting anyone to even help me with this
**** thing and am tired of getting ripped off. Im just asking for some
help on this situation. Maybe you or someone else you know has had a
similar problem. Please email me at my address or post your replies
here.
Thanks.....
Richard B.
porter481@hotmail.
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